I assume that most of us now carry smart phones. Most of these have the facility to pin point your location. I have a blackberry and this will indicate my location when I take a photograph so the technology is built in. I am sure that there are lots of apps for phones that act like GPS. My question is if these phones are able to do this type of tracking can this be used in reverse by emergency services if ever we found ourselves in a difficult situation. Also does anybody know if you are in a location that does not have a signal you can be located by the fact that your phone would be searching for a signal?